Am 21.04.2013 21:23, schrieb [email protected]:
> Thanks, that makes sense.
>
> In blend.c there is code conditional for non LAB colorspace
> "if(cst==iop_cs_Lab)"
>
> I don't understand how this would be used though.
> Aren't all module operations in Darktable done in LAB colorspace?
>
> For example how could I get the colorize module to work in RGB colorspace?
>
> Is there something in "input color profile" to change this?

You can't. darktable applies the modules in a fixed sequence and the 
position in the pixelpipe defines what colorspace it acts in. You can 
find more about that aspect in our usermanual:

http://www.darktable.org/usermanual/ch03s03s06.html.php

Ulrich



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